多选题Examine the following statement that is used to modify the constraint on the SALES table： SQL> ALTER TABLE SALES MODIFY CONSTRAINT pk DISABLE VALIDATE； Which three statements are true regarding the above command（）AThe constraint remains valid.BThe inde

题目
多选题
Examine the following statement that is used to modify the constraint on the SALES table： SQL> ALTER TABLE SALES MODIFY CONSTRAINT pk DISABLE VALIDATE； Which three statements are true regarding the above command（）
A

The constraint remains valid.

B

The index on the constraint is dropped.

C

It allows the loading of data into the table using SQL*Loader.

D

New data conforms to the constraint， but existing data is not checked

E

It allows the data manipulation on the table using INSERT/UPDATE/DELETE SQL statements.

相似考题

1.You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty. Which statement accomplishes this task?()A. ALTER TABLE students ADD PRIMARY KEY _ id;B. ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id);C. ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;D. ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);E. ALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);

2.Which syntax turns an existing constraint on?（）A、ALTER TABLE table_name ENABLE constraint_name;B、ALTER TABLE table_name STATUS = ENABLE CONSTRAINT constraint_name;C、ALTER TABLE table_name ENABLE CONSTRAINT constraint_name;D、ALTER TABLE table_name STATUS ENABLE CONSTRAINT constraint_name;E、ALTER TABLE table_name TURN ON CONSTRAINT constraint_name;

3. A constraint in a table is defined with the INITIALLY IMMEDIATE clause. You executed the ALTER TABLEcommand with the ENABLE VALIDATE option to enable the constraint that was disabled.  What are the twoeffects of this command（）A、It fails if any existing row violates the constraint.B、It does not validate the existing data in the table.C、It enables the constraint to be enforced at the end of each transaction.D、It prevents insert， update， and delete operations on the table while the constraint is in the process of beingenabled

4.Which syntax turns an existing constraint on? ()A. ALTER TABLE table_name ENABLE constraint_name;B. ALTER TABLE table_name STATUS = ENABLE CONSTRAINT constraint _ name;C. ALTER TABLE table_name ENABLE CONSTRAINT constraint _ name;D. ALTER TABLE table_name TURN ON CONSTRAINT constraint _ name;

参考答案和解析
正确答案： E,B
解析： 暂无解析
更多“多选题Examine the following statement that is used to modify the constraint on the SALES table： SQL ALTER TABLE SALES MODIFY CONSTRAINT pk DISABLE VALIDATE； Which three statements are true regarding the above command（）AThe constraint remains valid.BThe index”相关问题

  • 第1题：

    Evaluate the CREATE TABLE statement：   CREATE TABLE products   （product_id NUMBER （6）  CONSTRAINT prod_id_pk PRIMARY KEY，  product_name VARCHAR2 （15））；   Which statement is true regarding the PROD_ID_PK constraint？（）

    • A、 It would be created only if a unique index is manually created first.
    • B、 It would be created and would use an automatically created unique index.
    • C、 It would be created and would use an automatically created nonunique index.
    • D、 It would be created and remains in a disabled state because no index is specified in the command.

    正确答案:B

  • 第2题：

    Which syntax turns an existing constraint on?（）

    • A、ALTER TABLE table_name ENABLE constraint_name;
    • B、ALTER TABLE table_name STATUS = ENABLE CONSTRAINT constraint _ name;
    • C、ALTER TABLE table_name ENABLE CONSTRAINT constraint _ name;
    • D、ALTER TABLE table_name TURN ON CONSTRAINT constraint _ name;

    正确答案:C

  • 第3题：

    Which statement adds a constraint that ensures the CUSTOMER_NAME column of the CUSTOMERS table holds a value?（）

    • A、ALTER TABLE customers ADD CONSTRAINT cust_name_nn CHECK customer_name IS NOT NULL;
    • B、ALTER TABLE customers MODIFY CONSTRAINT cust_name_nn CHECK customer_name IS NOT NULL;
    • C、ALTER TABLE customers MODIFY customer_name CONSTRAINT cust_name_nn NOT NULL;
    • D、ALTER TABLE customers MODIFY customer_name CONSTRAINT cust_name_nn IS NOT NULL;
    • E、ALTER TABLE customers MODIFY name CONSTRAINT cust_name_nn NOT NULL;
    • F、ALTER TABLE customers ADD CONSTRAINT cust_name_nn CHECK customer_name NOT NULL;

    正确答案:C

  • 第4题：

    You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty.Which statement accomplishes this task?（）

    • A、ALTER TABLE students ADD PRIMARY KEY student_id;
    • B、ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student _ id);
    • C、ALTER TABLE students ADD CONSTRAINT stud _ id _pk PRIMARY KEY (student _ id);
    • D、ALTER TABLE students MODIFY CONSTRAINT stud _ id _pk PRIMARY KEY (student _ id);

    正确答案:C

  • 第5题：

    Examine the following statement that is used to modify the constraint on the SALES table： SQL> ALTER TABLE SALES MODIFY CONSTRAINT pk DISABLE VALIDATE； Which three statements are true regarding the above command（）

    • A、The constraint remains valid.
    • B、The index on the constraint is dropped.
    • C、It allows the loading of data into the table using SQL*Loader.
    • D、New data conforms to the constraint， but existing data is not checked
    • E、It allows the data manipulation on the table using INSERT/UPDATE/DELETE SQL statements.

    正确答案:A,B,C

  • 第6题：

    多选题
    Examine the following command: CREATE TABLE (prod_id number(4), Prod_name varchar2 (20), Category_id number(30), Quantity_on_hand number (3) INVISIBLE); Which three statements are true about using an invisible column in the PRODUCTS table?（）
    A

    The %ROWTYPE attribute declarations in PL/SQL to access a row will not display the invisible column in the output.

    B

    The DESCRIBE commands in SQL *Plus will not display the invisible column in the output.

    C

    Referential integrity constraint cannot be set on the invisible column.

    D

    The invisible column cannot be made visible and can only be marked as unused.

    E

    A primary key constraint can be added on the invisible column.


    正确答案： A,D
    解析： 暂无解析

  • 第7题：

    多选题
    A constraint in a table is defined with the INITIALLY IMMEDIATE clause. You executed the ALTER TABLEcommand with the ENABLE VALIDATE option to enable the constraint that was disabled.  What are the twoeffects of this command（）
    A

    It fails if any existing row violates the constraint.

    B

    It does not validate the existing data in the table.

    C

    It enables the constraint to be enforced at the end of each transaction.

    D

    It prevents insert， update， and delete operations on the table while the constraint is in the process of beingenabled


    正确答案： C,B
    解析： 暂无解析

  • 第8题：

    单选题
    You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty. Which statement accomplishes this task?（）
    A

    ALTER TABLE students ADD PRIMARY KEY _ id;

    B

    ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id);

    C

    ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;

    D

    ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);

    E

    ALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    View the Exhibit and examine the structure of the EMP table. You executed the following command to add a primary key to the EMP table：   ALTER TABLE emp   ADD CONSTRAINT emp_id_pk  PRIMARY KEY （emp_id）   USING INDEX emp_id_idx；   Which statement is true regarding the effect of the command？（）
    A

     The PRIMARY KEY is created along with a new index.

    B

     The PRIMARY KEY is created and it would use an existing unique index.

    C

     The PRIMARY KEY would be created in a disabled state because it is using an existing index.

    D

     The statement produces an error because the USING clause is permitted only in the CREATE TABLE command.


    正确答案： D
    解析： 暂无解析

  • 第10题：

    多选题
    Which two statements are true about the primary key constraint in a table？ （）
    A

    It is not possible to disable the primary key constraint.

    B

    It is possible to have more than one primary key constraint in a single table.

    C

    The primary key constraint can be referred by only one foreign key constraint.

    D

    The primary key constraint can be imposed by combining more than one column.

    E

    The non-deferrable primary key constraint creates an unique index on the primary key column if it is not already indexed.


    正确答案： D,B
    解析： 暂无解析

  • 第11题：

    单选题
    You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty. Which statement accomplishes this task?（）
    A

    ALTER TABLE students ADD PRIMARY KEY student_id;

    B

    ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id);

    C

    ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;

    D

    ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);

    E

    ALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);


    正确答案： E
    解析： 暂无解析

  • 第12题：

    单选题
    Which statement adds a constraint that ensures the CUSTOMER_NAME column of the CUSTOMERS table holds a value?（）
    A

    ALTER TABLE customers ADD CONSTRAINT cust_name_nn CHECK customer_name IS NOT NULL;

    B

    ALTER TABLE customers MODIFY CONSTRAINT cust_name_nn CHECK customer_name IS NOT NULL;

    C

    ALTER TABLE customers MODIFY customer_name CONSTRAINT cust_name_nn NOT NULL;

    D

    ALTER TABLE customers MODIFY customer_name CONSTRAINT cust_name_nn IS NOT NULL;

    E

    ALTER TABLE customers MODIFY name CONSTRAINT cust_name_nn NOT NULL;

    F

    ALTER TABLE customers ADD CONSTRAINT cust_name_nn CHECK customer_name NOT NULL;


    正确答案： F
    解析： 暂无解析

  • 第13题：

    Which two statements are true about the primary key constraint in a table？ （）

    • A、It is not possible to disable the primary key constraint.
    • B、It is possible to have more than one primary key constraint in a single table.
    • C、The primary key constraint can be referred by only one foreign key constraint.
    • D、The primary key constraint can be imposed by combining more than one column.
    • E、The non-deferrable primary key constraint creates an unique index on the primary key column if it is not already indexed.

    正确答案:D,E

  • 第14题：

    You just issued the following statement: ALTER TABLE SALES DROP COLUMN PROFIT. Which of the following choices identifies when the column will actually be removed from Oracle?（）

    • A、Immediately following statement execution 
    • B、After the ALTER TABLE DROP UNUSED COLUMNS command is issued 
    • C、After the ALTER TABLE SET UNUSED COLUMN command is issued 
    • D、After the ALTER TABLE MODIFY command is issued

    正确答案:B

  • 第15题：

    Examine the command that is used to create a table：  SQL> CREATE TABLE orders（oid NUMBER（6） PRIMARY KEY， odate DATE， ccode NUMBER（6）， oamt NUMBER（10，2）） TABLESPACE users；  Which two statements are true about the effect of the above command） （）

    • A、A CHECK constraint is created on the OID column.
    • B、A NOT NULL constraint is created on the OID column.
    • C、The ORDERS table is the only object created in the USERS tablespace.
    • D、The ORDERS table and a unique index are created in the USERS tablespace.
    • E、The ORDERS table is created in the USERS tablespace and a unique index is created on the OIDcolumn in the SYSTEM tablespace.

    正确答案:B,D

  • 第16题：

    You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty. Which statement accomplishes this task?（）

    • A、ALTER TABLE students ADD PRIMARY KEY _ id;
    • B、ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id);
    • C、ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;
    • D、ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
    • E、ALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);

    正确答案:D

  • 第17题：

    Examine the following statement that is used to modify the primary key constraint on the SALES table： SQL> ALTER TABLE SALES MODIFY CONSTRAINT pk DISABLE VALIDATE； Which three statements aretrue regarding the above command（）

    • A、The constraint remains valid.
    • B、The index on the constraint is dropped.
    • C、It allows the loading of data into the table using SQL *Loader.
    • D、New data conforms to the constraint， but existing data is not checked.
    • E、It allows the data manipulation on the table using INSERT/UPDATE/DELETE SQL statements.

    正确答案:A,B,C

  • 第18题：

    多选题
    Examine the command that is used to create a table： SQL> CREATE TABLE orders（oid NUMBER（6） PRIMARY KEY， odate DATE， ccode NUMBER （6）， oamtNUMBER（10，2）） TABLESPACE users； Which two statements are true about the effect of the above command（）
    A

    A CHECK constraint is created on the OID column.

    B

    A NOT NULL constraint is created on the OID column.

    C

    The ORDERS table is the only object created in the USERS tablespace.

    D

    The ORDERS table and a unique index are created in the USERS tablespace.

    E

    The ORDERS table is created in the USERS tablespace and a unique index is created on the OID columnin the SYSTEM tablespace.


    正确答案： B,E
    解析： 暂无解析

  • 第19题：

    多选题
    Examine the following statement that is used to modify the primary key constraint on the SALES table： SQL> ALTER TABLE SALES MODIFY CONSTRAINT pk DISABLE VALIDATE； Which three statements aretrue regarding the above command（）
    A

    The constraint remains valid.

    B

    The index on the constraint is dropped.

    C

    It allows the loading of data into the table using SQL *Loader.

    D

    New data conforms to the constraint， but existing data is not checked.

    E

    It allows the data manipulation on the table using INSERT/UPDATE/DELETE SQL statements.


    正确答案： C,B
    解析： 暂无解析

  • 第20题：

    单选题
    Evaluate the CREATE TABLE statement：   CREATE TABLE products   （product_id NUMBER （6）  CONSTRAINT prod_id_pk PRIMARY KEY，  product_name VARCHAR2 （15））；   Which statement is true regarding the PROD_ID_PK constraint？（）
    A

     It would be created only if a unique index is manually created first.

    B

     It would be created and would use an automatically created unique index.

    C

     It would be created and would use an automatically created nonunique index.

    D

     It would be created and remains in a disabled state because no index is specified in the command.


    正确答案： A
    解析： 暂无解析

  • 第21题：

    多选题
    A constraint in a table is defined with the INITIALLY IMMEDIATE clause. You executed the ALTER TABLE command with the ENABLE VALIDATE option to enable the constraint that was disabled. What are the two effects of this command？（）
    A

    It fails if any existing row violates the constraint.

    B

    It does not validate the existing data in the table.

    C

    It enables the constraint to be enforced at the end of each transaction.

    D

    It prevents insert， update， and delete operations on the table while the constraint is in the process of being enabled.


    正确答案： C,B
    解析： 暂无解析

  • 第22题：

    单选题
    You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty.Which statement accomplishes this task?（）
    A

    ALTER TABLE students ADD PRIMARY KEY student_id;

    B

    ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student _ id);

    C

    ALTER TABLE students ADD CONSTRAINT stud _ id _pk PRIMARY KEY (student _ id);

    D

    ALTER TABLE students MODIFY CONSTRAINT stud _ id _pk PRIMARY KEY (student _ id);


    正确答案： B
    解析： 暂无解析

  • 第23题：

    多选题
    Examine the following statement that is used to modify the constraint on the SALES table： SQL> ALTER TABLE SALES MODIFY CONSTRAINT pk DISABLE VALIDATE； Which three statements are true regarding the above command（）
    A

    The constraint remains valid.

    B

    The index on the constraint is dropped.

    C

    It allows the loading of data into the table using SQL*Loader.

    D

    New data conforms to the constraint， but existing data is not checked

    E

    It allows the data manipulation on the table using INSERT/UPDATE/DELETE SQL statements.


    正确答案： C,A
    解析： 暂无解析

  • 第24题：

    单选题
    Examine the following query output: You issue the following command to import tables into the hr schema: $ > impdp hr/hr directory = dumpdir dumpfile = hr_new.dmp schemas=hr TRANSFORM=DISABLE_ARCHIVE_LOGGING: Y Which statement is true?（）
    A

    All database operations performed by the impdp command are logged.

    B

    Only CREATE INDEX and CREATE TABLE statements generated by the import are logged.

    C

    Only CREATE TABLE and ALTER TABLE statements generated by the import are logged.

    D

    None of the operations against the master table used by Oracle Data Pump to coordinate its activities are logged.


    正确答案： A
    解析： 暂无解析

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